Subject
regional geology
31
stratigraphy
16
geologic structure
13
geology
12
geomorphology
8
geological map
7
sedimentary petrography
7
sedimentation
7
tectonics
7
groundwater
6
sedimentology
6
hydrogeology
5
hydrology
5
paleontology
4
sedimentary basin
4
sedimentary deposit
4
water budget
4
water protection
4
carbon
3
devonian
3
groundwater pollution
3
limnology
3
paleogeography
3
sedimentary rock
3
Rhine river
2
cartography
2
coal deposit
2
coal mining
2
drilling
2
economic geography
2
environmental protection
2
fossil
2
geochemistry
2
geochronology
2
hydrocarbon
2
landscape
2
methane
2
natural gas
2
natural gas deposit
2
natural gas exploration
2
natural gas formation
2
ore deposit
2
organic matter
2
paleoecology
2
petrology
2
soil protection
2
soil science
2
soil water
2
source rock
2
water management
2
more ...